Material Testing 2.0 represents a contemporary approach to material characterisation and the identification of material parameters. The concept is based on Digital Image Correlation (DIC), which enables full-field measurement of strains within a specimen exhibiting heterogeneous stress–strain states. Such specimens are typically designed to induce maximally heterogeneous strain fields while avoiding pronounced stress and strain concentrations, as these cannot be reliably captured using DIC. Once the strain field is obtained, the identification of material parameters is commonly performed using inverse methods, such as finite element model up dating, the virtual fields method, or the equilibrium gap method. In this work, the candidate shall address the identification of material parameters of a linear elastic material based on strain fields obtained via DIC. A methodology linking DIC data with the finite element method and the inverse equilibrium gap method shall be developed. The proposed approach shall be validated through uniaxial and biaxial tensile tests within a virtual experimental framework. The candidate shall analyse the convergence behaviour of the iterative procedure and assess the agreement of the identified material parameters, as well as discuss the advantages, disadvantages, and limitations of the method.
|
